Event: D&DCL Div 3

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Opponent	Rating	Result
Michael D Boreham	1499	1 - 0
Matthew Caswell	1628	0 - 1
Ryan Witham	0	½ - ½
Herbert TT Loomes	1521	0 - 1
Tony O'Donovan	0	½ - ½
Alex Abdullahi	1468	½ - ½
Graeme Drayton	0	1 - 0
Douglas Bramley	1398	0 - 1
George Moorcroft	1249	½ - ½
Tony O'Donovan	0	1 - 0
Jon Jenson	1465	0 - 1

performance = (sum(opponents ratings) + 400(wins-losses)) / games

893 = (10228 + 400 * (3 - 4)) / 11)